'The Walking Dead' season 3 finale "Welcome to the Tombs" saw some major additions to the prison population, but it's the series regulars that are really growing. TVLine has announced that Chad Coleman, Sonequa Martin-Green and Emily Kinney have all been promoted to series regulars, giving their characters Tyreese, Sasha and Beth some much-needed screentime next year.

Both Coleman and Martin-Green joined the series as Tyreese and sister Sasha in mid-season finale "Made to Suffer,' while Kinney's character first appeared in season 2 episode "Bloodletting." The season 4 regular role of Army medic "Roy Stark" has yet to be cast, but AMC earlier confirmed that David Morrissey's villainous Governor would return in season 4 as a series regular.

Interestingly, only Coleman's character Tyreese shares a comic-book counterpart, though Martin-Green's Sasha and Kinney's Beth represent composite adaptations of several characters from Robert Kirkman's work.

Sounds like Rick Grimes will have to share the spotlight quite a bit in season 4, but what say you? Are you excited to see more from Tyreese, Sasha and Beth, now that Chad Coleman, Sonequa Martin-Green and Emily Kinney have gone full-time? What major characters would you like to see appear in 'The Walking Dead' season 4?